/*
 * Copyright 2017 M. Eric DeFazio.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package varcode.author;

import varcode.context.Directive;

/**
 * Perform some actions BEFORE the vars are derived and bound/filled into the
 * template to author the document.
 * 
 * @author M. Eric DeFazio eric@varcode.io
 */
public interface PreProcessor
    extends Directive
{
    /**
     * manipulate the AuthorState BEFORE the vars are derived and bound/filled into
     * the document
     *
     * @param authorState the state of the document
     */
    void preProcess( AuthorState authorState );
}
